GENTLEMEN:--I am gratified to learn, that you are about issuing a sixth volume of your “Library of Christian Knowledge.” The volumes already published constitute a very valuable accession to our stock of religious literature, and are worthy of a place in every Christian family. The editor is well known to the public, as the author of several practical works of great value; and I am acquainted with no man who is better qualified than himself, to superintend a publication of the kind in question. Believing as I do, that you are very effectually promoting the interests of true religion, by placing within the reach of American Christians, such works as those contemplated in the plan of your library, I trust the enterprise will receive a liberal and growing patronage, which will enable you to make it, in extent as well as in character, a complete “Library of Christian Knowledge.” I am, very respectfully, yours, &c. H. A. BOARDMAN, _Pastor of the Tenth Presbyterian Church, Philadelphia_. _Baltimore, Feb. 27th, 1837._ MESSRS. WM. MARSHALL & CO. GENTLEMEN:--I am extremely sorry, that it is not in my power to comply with the request contained in your letter. The difficulty arises from no indisposition to accommodate you, nor from any want of confidence in the work, with which you are furnishing the public, but simply from the fact, that I have only the last three volumes of the series, and of these, have been so situated, as to have read only volumes three and four. If I had the leisure at present, it would give me pleasure to procure and peruse the others; and then forward you the recommendation, which I am sure I should feel authorised to give. “Russell’s Letters,” I have read with more satisfaction than I have derived from most of the modern publications which have come under my notice; and I do not hesitate to say, that the pleasure of perusing those two volumes, would be an equivalent for the price of the five. In the competency of the editor to continue the series, I have full confidence. He has given sufficient proof in the character of the selections already made. I am therefore gratified to learn that the “Library of Christian Knowledge” is to be enlarged. In haste, yours truly, J. JOHNS, D. D. MESSRS. WM. MARSHALL & CO. GENTLEMEN:--Your favour of the 13th inst. was duly received. But the engagements of the season, through which we have been passing, must be my apology for not sooner returning an answer.